WHAT is the real-world MPG gain from a DPF delete and HOW does it affect engine longevity?

[RustStateMind]

I’m tired of my 2008 LMM going into "Regen" every other day and watching my fuel economy tank to 10 MPG. I’ve heard that deleting the DPF and EGR not only helps the truck breathe but also stops soot from being recirculated into the intake. For those who have been "weight reduced" for 50k+ miles, WHAT kind of mileage are you actually seeing? Also, HOW much of a pain is it to deal with the tuning side of things now that it's getting harder to find support?

 

[TailgateTalk]

The MPG gains are very real. On my 2008 LMM, I went from struggling to hit 13 MPG on the highway to a consistent 17-18 MPG after the delete. When the truck isn't constantly dumping extra fuel down the exhaust stroke for a regen cycle, the efficiency jumps significantly. As for longevity, stopping that soot from the EGR from caking up your intake manifold is the best thing you can do for the engine's long-term health. Clean air in, clean oil out—it’s that simple.